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Finding the Fourth Proportional to 48,398.80, 66,788.28 and 28,256.80

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Solution

The fourth proportional to 48,398.80, 66,788.28 and 28,256.80 is: 38,993.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,398.80 : 66,788.28 = 28,256.80 : x
  2. Step 2: Convert to fraction form
    48,398.80/66,788.28 = 28,256.80/x
  3. Step 3: Cross multiply
    48,398.80x = 66,788.28 × 28,256.80
  4. Step 4: Simplify right side
    48,398.80x = 1,887,223,070.30
  5. Step 5: Solve for x
    x = 1,887,223,070.30/48,398.80
  6. Step 6: Final answer
    x = 38,993.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.